A patented slider mechanism allows cars to be pulled to windward without releasing the leeward control line. Windward sheeting cars stay in place during tacks. Makes racing short-handed a lot more fun. Indicated use is based upon monohulls with end-boom travelers. Windward Sheeting Adapter Kit fits 2726, 2727, 2728, 2729, 2730, 2731, 2735, 2736, 2753 and 2754 cars. Track Type: Small Boat CB Track: 2720, 2721, 373, 374, 2725, 2751 Block Type: Uses 2740 Control Blocks Ball Bearings: SB: Delrin; HL/1250: Torlon Cleat Type: Modified 150 Cam-Matic Shackle: Pivoting shackle Cam: Leeward cleat opens automatically Purchase: 2:1/3:1 Line Diameter: 5/16" max. (8mm)